CN106020074A - One-valuing one-adding diagnosis functional safety analog input circuit - Google Patents
One-valuing one-adding diagnosis functional safety analog input circuit Download PDFInfo
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- CN106020074A CN106020074A CN201610630665.XA CN201610630665A CN106020074A CN 106020074 A CN106020074 A CN 106020074A CN 201610630665 A CN201610630665 A CN 201610630665A CN 106020074 A CN106020074 A CN 106020074A
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- diagnosis
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 230000005611 electricity Effects 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 9
- 230000001629 suppression Effects 0.000 claims description 7
- 230000001052 transient effect Effects 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 2
- 238000004088 simulation Methods 0.000 claims 1
- 230000003321 amplification Effects 0.000 abstract 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
- G05B19/0425—Safety, monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/3167—Testing of combined analog and digital circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2604—Test of external equipment
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Disclosed is a one-valuing one-adding diagnosis functional safety analog input circuit. The circuit is small in size, low in cost, good in redundancy, high in availability, and quite suitable for middle and small scale functional safety control system scheme. The circuit comprises an input circuit portion and a diagnosis circuit portion. The input circuit portion is of a 1OO1 framework, collection of on-site analog quantity signals is achieved, and analog signals are converted into digital signals. The input circuit portion comprises a sampling resistance network circuit (A1), an analog switch circuit (A2), an instrument amplification circuit (A3) and an analog-to-digital conversion circuit (A4). The diagnosis circuit portion comprises a resistance diagnosis circuit and a DAC diagnosis circuit. The resistance diagnosis circuit reuses the input circuit portion, and failure diagnosis of the input circuit portion is achieved; the DAC diagnosis circuit comprises an digital-to-analog conversion circuit (A5) and reuses the input circuit portion, diagnosis of a conversion result of the analog-to-digital conversion circuit is achieved, and failure diagnosis of the sampling resistance network circuit, the analog switching circuit and the instrument amplification circuit is achieved.
Description
Technical field
The invention belongs to the technical field of Industry Control, particularly relate to a kind of one and take a function peace adding diagnosis
Full simulated measurement input circuit.
Background technology
Design currently for functional safety simulated measurement input circuit combines IEC61508, for realizing height diagnosis
Coverage rate, demand is as follows:
1, DC Line Fault model, drift and oscillation fault need to be diagnosed.
2, input relatively or is decided by vote.
3, test figure diagnostic mode.
4, input short, open circuit, the super upper limit and the diagnosis of super lower limit.
5, input cable uses shielded cable.
Functional safety simulated measurement input circuit the most on the market mostly is 2OO3 framework, although product can be expired
Foot functional safety requirement, but the framework cost of 2OO3 is high, and volume is big, higher to cost constraint at some,
The smaller application scenario of installing space is inapplicable.And the design that the present invention proposes has, and volume is little, cost
The advantage such as low, redundancy good, availability is strong.It is especially suitable for middle and small scale functional safety control system side
Case.
Summary of the invention
The technical problem to be solved in the present invention is the defect overcoming prior art, it is provided that a kind of one takes one adds and examine
Disconnected functional safety simulated measurement input circuit, its volume is little, low cost, redundancy are good, availability is strong,
It is especially suitable for middle and small scale functional safety control system scheme.
The technical scheme solving the problems referred to above is: this one takes a functional safety analog input adding diagnosis
Circuit, it includes input circuit part and diagnostic circuit part；Input circuit part is 1OO1 framework, real
The collection of existing in-site modeling amount signal, and convert analog signals into digital signal, input circuit part bag
Include sampling resistor lattice network (A1), analog switching circuit (A2), magnifier (A3),
Analog to digital conversion circuit (A4)；Diagnostic circuit part includes resistance diagnostic circuit and DAC diagnostic circuit, electricity
Resistance diagnostic circuit multiplexing input circuit part, it is achieved the failure diagnosis to input circuit part；DAC diagnoses
Circuit includes D/A converting circuit (A5), and multiplexing input circuit part, it is achieved to analog to digital conversion circuit
(A4) diagnosis of transformation result, and sampling resistor lattice network (A1), analog switching circuit
(A2), the failure diagnosis of magnifier (A3).
The present invention passes through input circuit part and diagnostic circuit part, can realize in-site modeling amount 4-20mA electricity
Stream Real-time Collection, by diagnostic circuit can real-time diagnosis input circuit fault and component failure, can be real
Time the diagnosis short circuit of field channels or open circuit fault, the architecture design of 1OO1D (takes adds diagnosis),
Meeting functional safety requirement, reduce product cost, volume is little, low cost, redundancy are good, availability
By force, middle and small scale functional safety control system scheme it is especially suitable for.
Accompanying drawing explanation
Fig. 1 is the circuit side that according to the present invention takes a functional safety simulated measurement input circuit adding diagnosis
Block diagram.
It is former that Fig. 2 is that according to the present invention takes the circuit of a functional safety simulated measurement input circuit adding diagnosis
Reason figure.
Detailed description of the invention
As it is shown in figure 1, this one takes a functional safety simulated measurement input circuit adding diagnosis, it includes defeated
Enter circuit part and diagnostic circuit part；Input circuit part is 1OO1 framework, it is achieved in-site modeling amount is believed
Number collection, and convert analog signals into digital signal, input circuit part includes sampling resistor network
Circuit (A1), analog switching circuit (A2), magnifier (A3), analog to digital conversion circuit
(A4)；Diagnostic circuit part includes resistance diagnostic circuit and DAC diagnostic circuit, and resistance diagnostic circuit is multiple
By input circuit part, it is achieved the failure diagnosis to input circuit part；DAC diagnostic circuit includes digital-to-analogue
Change-over circuit (A5), and multiplexing input circuit part, it is achieved the conversion to analog to digital conversion circuit (A4)
The diagnosis of result, and sampling resistor lattice network (A1), analog switching circuit (A2), instrument put
The failure diagnosis of big circuit (A3).
The present invention passes through input circuit part and diagnostic circuit part, can realize in-site modeling amount 4-20mA electricity
Stream Real-time Collection, by diagnostic circuit can real-time diagnosis input circuit fault and component failure, can be real
Time the diagnosis short circuit of field channels or open circuit fault, the architecture design of 1OO1D (takes adds diagnosis),
Meeting functional safety requirement, reduce product cost, volume is little, low cost, redundancy are good, availability
By force, middle and small scale functional safety control system scheme it is especially suitable for.
It addition, as in figure 2 it is shown, sampling resistor lattice network (A1) including: the first, third and fourth
Transient Suppression Diode, the first electric fuse, the first critesistor, the second resistance, third and fourth is accurate
Resistance, the second Zener diode, Transient Suppression Diode realizes the EMC protection of passage, and electric fuse realizes
The overcurrent protection of passage, Zener diode realizes the overvoltage protection of passage.
It addition, as in figure 2 it is shown, analog switching circuit (A2) including: the first analog switch (U1),
Second electric capacity (C2), the 4th electric capacity (C4), the 8th electric capacity (C8), the 5th resistance (R5), the
Six resistance (R6), the 9th resistance (R9), the tenth resistance (R10) and the 11st resistance (R11).
It addition, as in figure 2 it is shown, magnifier (A3) including: second instrument amplifier chip
(U2), the first two-in-series Schottky diode (Q1), the 5th electric capacity (C5), the 6th electric capacity
(C6), the 7th electric capacity (C7), the 7th resistance (R7) and the 8th resistance (R8).
It addition, as in figure 2 it is shown, analog to digital conversion circuit (A4) including: the 3rd modulus conversion chip
(U3), the 4th a reference source chip (U4), the 3rd electric capacity (C3), the 9th electric capacity (C9), the tenth
Electric capacity (C10), the 11st electric capacity (C11), the 13rd electric capacity (C13), the 12nd resistance
(R12), the first magnetic bead (L1).
It addition, as in figure 2 it is shown, D/A converting circuit (A5) including: the 5th analog-digital chip
(U5), the 6th a reference source chip (U6), the 13rd resistance (R13), the 14th resistance
(R14), the 15th resistance (R15), the second magnetic bead (L2), the 12nd electric capacity (C12), the
14 electric capacity (C14), the 15th electric capacity (C15) and the 16th electric capacity (C16).
It is described more particularly below the specific embodiment of the present invention.
As in figure 2 it is shown, scene current signal is converted to voltage letter by sampling resistor lattice network (A1)
Number, and realize passage EMC protection, including the first electric fuse F1, the first Transient Suppression Diode D1,
3rd Transient Suppression Diode D3, the 4th Transient Suppression Diode D4, second Zener diode D2, first
Electric capacity C1, the first critesistor R1, the second resistance R2, the 3rd precision resistance R3 and the 4th precision resistance
R4.F1 is connected at feeder connection, it is achieved passage overcurrent protection；D1, D3 and D4 realize passage electrostatic and
Carrying out surge protection, wherein D1 and D3 is common mode protection, and D4 is differential mode protection；C1 realizes radio frequency protection；D2 is also
It is associated in sampling resistor two ends, subsequent conditioning circuit is realized overvoltage protection；R1 is circuit protection critesistor, string
It is associated in the passage of F1 rear end, limits channel current value, it is achieved overcurrent protection, and when passage overvoltage
Carry out current limliting；R2 is divider resistance, provides overvoltage protection when passage overvoltage；R3 and R4 is for gathering electricity
Resistance, is converted to voltage signal by scene current signal.It is connected in parallel on logical after F1, R1, R2, R3 and R4 series connection
Between road signal input part and ground, the series connection direction from channel signal input to ground is followed successively by: F1,
R1, R2, R3, R4, wherein on R4, terminal voltage is input voltage, and the upper terminal voltage of R3 is resistance diagnostic circuit
Diagnosis voltage.
As in figure 2 it is shown, analog switching circuit (A2) switching channel is Gather and input, resistance diagnosis input
Or DAC diagnosis input, including the first analog switch U1, the second electric capacity C2, the 4th electric capacity C4, the 8th
Electric capacity C8, the 5th resistance R5, the 6th resistance R6, the 9th resistance R9, the tenth resistance R10 and the 11st electricity
Resistance R11.First pin 1 of U1 connects positive supply, and the tenth three-prong 13 connects negative supply, the 9th pin 9 and
16 pin 16 ground connection, the tenth pin the 10, the 11st pin the 11 and the 12nd pin 12 is unsettled, the second pipe
Foot 2 R5 that connects is followed by the diagnosis voltage of A1 circuit, and three-prong 3 connects the 5th pin 5, and the 4th pin 4 is connected
R6 is followed by the input voltage of (A1) circuit, and the 7th pin 7 connects the output voltage of DAC-circuit (A5), the
Six pins 6 go to couple magnifier (A3) by C2, and the 8th pin 8 is connect by R11 with pulling down to
Processor I/O pin, the 15th pin 15 connects processor I/O pin by R10 with pulling down to, and the 14th
Pin 14 pulls down to ground by R9；C4 and C8 is respectively the decoupling capacitor of negative supply and positive supply.
As in figure 2 it is shown, input electricity before magnifier (A3) conditioning channel impedance, clamper ADC chip
Pressure, including second instrument amplifier chip U2, the first two-in-series Schottky diode Q1, the 5th electric capacity
C5, the 6th electric capacity C6, the 7th electric capacity C7, the 7th resistance R7 and the 8th resistance R8.First pin 1 of U2
With the 6th pin 6 ground connection, the second pin 2 and three-prong 3 are unsettled, and the 8th pin 8 connects positive supply, and the 5th
Pin 5 connects negative supply, and the 4th pin 4 connects the output of (A2) circuit, and the 7th pin 7 connects R7 one end；Q1's
First pin 1 ground connection, the second pin 2 connects positive supply, and three-prong 3 connects the R7 other end；R7 and R8 connects
Between the outfan and analog to digital conversion circuit (A4) input of U2, R7 with R8 is connected the pin of termination Q1
The pin 7 of 3, R7 another termination U2, the R8 other end is followed by (A4) circuit input end by C5 filtering；C6
With the decoupling capacitor that C7 is respectively negative supply and positive supply.
As in figure 2 it is shown, channel analog signal is converted into digital signal by analog to digital conversion circuit (A4), bag
Include the 3rd modulus conversion chip U3, the 4th a reference source chip U4, the 3rd electric capacity C3, the 9th electric capacity C9,
Ten electric capacity C10, the 11st electric capacity C11, the 13rd electric capacity C13, the 12nd resistance R12, the first magnetic bead
L1.First pin 1 of U3 is the first acquisition channel input, connects (A3) circuit output end, the second pipe
Foot 2-the 8th pin 8 is the second-the eight acquisition channel input, unsettled；9th pin 9 of U3 meets C10 mono-
End, C10 other end ground connection；Tenth pin 10 of U3 connects a reference source；U3 the 11st pin 11 connects processor
SPI interface chip-select pin；12nd pin 12 of U3 connects processor SPI interface clock pins；The tenth of U3
Three-prong 13 meets processor SPI interface master and enters from going out pin；14th pin 14 of U3 meets processor SPI and connects
Mouth master go out from entering pin；15th pin 15 ground connection of U3；16th pin 16 of U3 connects power supply.U4's
First pin 1 and the second pin 2 ground connection；First pin 1 and second pin 2 ground connection of U4；Three-prong 3
Connect the 4th pin 4, pin 3 and pin 4 connection and be followed by L1 one end, another termination a reference source input electricity of L1
Source；5th pin 5 of U4 connects the 6th pin 6, and pin 5 and pin 6 connect and be followed by R12 one end, R12 another
Termination a reference source output.C3, C9, C11 and C13 are power supply coupling capacitor.
As in figure 2 it is shown, DAC-circuit (A5) converts digital signals into analogue signal, complete DAC diagnosis
Signal exports, including the 5th analog-digital chip U5, the 6th a reference source chip U6, the 13rd resistance
R13, the 14th resistance R14, the 15th resistance R15, second magnetic bead L2, the 12nd electric capacity C12, the tenth
Four electric capacity C14, the 15th electric capacity C15 and the 16th electric capacity C16.First pin 1 of U5 is drop-down by R13
To ground, the second pin 2 connects processor SPI interface chip-select pin, and three-prong 3 R14 that connects is followed by A2 circuit
The pin 7 of U1, the 5th pin the 5, the 6th pin the 6, the 7th pin the 7, the 9th pin the 9, the tenth pin
10, the 11st pin the 11, the 12nd pin 12 and the tenth three-prong 13 are unsettled, and the 8th pin 8 connects benchmark
Source, the 14th pin 14 ground connection, the 15th pin 15 meets the master of processor SPI interface and goes out from entering pin,
16th pin 16 connects the clock pins of processor SPI interface.First pin 1 of U6 and the second pin 2 connect
Ground；Three-prong 3 connects the 4th pin 4, pin 3 and pin 4 connection and is followed by L2 one end, another termination base of L2
Quasi-source input power；5th pin 5 of U6 connects the 6th pin 6, pin 5 and pin 6 connection and is followed by R15 mono-
End, another termination a reference source output of R15.C12, C14, C15 and C16 are power supply coupling capacitor.
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any pro forma limit
System.It will be apparent to an ordinarily skilled person in the art that every technical spirit according to the present invention is to above real
Execute any simple modification, equivalent variations and modification that example is made, the most still belong to the protection of technical solution of the present invention
Scope.
Claims (6)
1. one kind one takes a functional safety simulated measurement input circuit adding diagnosis, it is characterised in that: its
Including input circuit part and diagnostic circuit part；Input circuit part is 1OO1 framework,
Realize the collection of in-site modeling amount signal, and convert analog signals into digital signal, defeated
Enter circuit part and include sampling resistor lattice network (A1), analog switching circuit
(A2), magnifier (A3), analog to digital conversion circuit (A4)；Diagnostic circuit
Part includes resistance diagnostic circuit and DAC diagnostic circuit, resistance diagnostic circuit multiplexing input electricity
Road part, it is achieved the failure diagnosis to input circuit part；DAC diagnostic circuit includes digital-to-analogue
Change-over circuit (A5), and multiplexing input circuit part, it is achieved to analog to digital conversion circuit
(A4) diagnosis of transformation result, and sampling resistor lattice network (A1), simulation
On-off circuit (A2), the failure diagnosis of magnifier (A3).
The most according to claim 1 one takes a functional safety analog input electricity adding diagnosis
Road, it is characterised in that: sampling resistor lattice network (A1) including: the first, the 3rd and
4th Transient Suppression Diode, the first electric fuse, the first critesistor, the second resistance,
Third and fourth precision resistance, the second Zener diode, Transient Suppression Diode realizes logical
The EMC protection in road, electric fuse realizes the overcurrent protection of passage, and Zener diode realizes logical
The overvoltage protection in road.
The most according to claim 1 one takes a functional safety analog input electricity adding diagnosis
Road, it is characterised in that: analog switching circuit (A2) including: the first analog switch
(U1), the second electric capacity (C2), the 4th electric capacity (C4), the 8th electric capacity (C8),
5th resistance (R5), the 6th resistance (R6), the 9th resistance (R9), the tenth resistance
And the 11st resistance (R11) (R10).
The most according to claim 1 one takes a functional safety analog input electricity adding diagnosis
Road, it is characterised in that: magnifier (A3) including: second instrument amplifier core
Sheet (U2), the first two-in-series Schottky diode (Q1), the 5th electric capacity (C5),
6th electric capacity (C6), the 7th electric capacity (C7), the 7th resistance (R7) and the 8th resistance
(R8)。
The most according to claim 1 one takes a functional safety analog input electricity adding diagnosis
Road, it is characterised in that: analog to digital conversion circuit (A4) including: the 3rd modulus conversion chip
(U3), the 4th a reference source chip (U4), the 3rd electric capacity (C3), the 9th electric capacity
(C9), the tenth electric capacity (C10), the 11st electric capacity (C11), the 13rd electric capacity
(C13), the 12nd resistance (R12), the first magnetic bead (L1).
The most according to claim 1 one takes a functional safety analog input electricity adding diagnosis
Road, it is characterised in that: D/A converting circuit (A5) including: the 5th analog-digital chip
(U5), the 6th a reference source chip (U6), the 13rd resistance (R13), the 14th electricity
Resistance (R14), the 15th resistance (R15), the second magnetic bead (L2), the 12nd electric capacity
(C12), the 14th electric capacity (C14), the 15th electric capacity (C15) and the 16th electric capacity
(C16)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630665.XA CN106020074A (en) | 2016-08-04 | 2016-08-04 | One-valuing one-adding diagnosis functional safety analog input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610630665.XA CN106020074A (en) | 2016-08-04 | 2016-08-04 | One-valuing one-adding diagnosis functional safety analog input circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106020074A true CN106020074A (en) | 2016-10-12 |
Family
ID=57134327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610630665.XA Pending CN106020074A (en) | 2016-08-04 | 2016-08-04 | One-valuing one-adding diagnosis functional safety analog input circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN106020074A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168283A (en) * | 2017-05-22 | 2017-09-15 | 上海自动化仪表有限公司 | Diagnostic device based on analog input |
| CN109991895A (en) * | 2017-12-29 | 2019-07-09 | 中国核动力研究设计院 | A kind of diagnostic system and method for electric current input channel |
| CN112612229A (en) * | 2020-12-16 | 2021-04-06 | 江苏利核仪控技术有限公司 | Analog signal input acquisition circuit of speed regulation controller and function safety guarantee method thereof |
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| JP2012039423A (en) * | 2010-08-09 | 2012-02-23 | Nippon Signal Co Ltd:The | Analog signal input device |
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| CN103728907A (en) * | 2014-01-20 | 2014-04-16 | 中国船舶重工集团公司第七一一研究所 | Diagnostic multi-type signal collecting module |
| CN204515418U (en) * | 2015-03-17 | 2015-07-29 | 杭州海康威视数字技术股份有限公司 | A kind of power supply control apparatus of safety-protection system |
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| JPS63186110A (en) * | 1987-01-29 | 1988-08-01 | Shimizu Teruhisa | Self-diagnostic device for analog input device |
| WO2010043386A1 (en) * | 2008-10-14 | 2010-04-22 | Aktiebolaget Skf | Signal analyzer |
| CN101825900A (en) * | 2009-03-06 | 2010-09-08 | 株式会社日立制作所 | Fault diagnosis device and fault diagnosis method for multi-channel analog input and output circuits |
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| CN203135851U (en) * | 2013-03-14 | 2013-08-14 | 美的集团股份有限公司 | Household electrical appliance ADC detection circuit and household electrical appliance equipped with the same |
| CN103634008A (en) * | 2013-11-29 | 2014-03-12 | 深圳市虹远通信有限责任公司 | Multi-channel signal collecting device and collecting method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107168283A (en) * | 2017-05-22 | 2017-09-15 | 上海自动化仪表有限公司 | Diagnostic device based on analog input |
| CN109991895A (en) * | 2017-12-29 | 2019-07-09 | 中国核动力研究设计院 | A kind of diagnostic system and method for electric current input channel |
| CN112612229A (en) * | 2020-12-16 | 2021-04-06 | 江苏利核仪控技术有限公司 | Analog signal input acquisition circuit of speed regulation controller and function safety guarantee method thereof |
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Application publication date: 20161012 |